An update to Counter-Strike: Source has been released. The update will be applied automatically when you restart Counter-Strike: Source. The major changes include:

Fixed a client crash on exit (after connecting to a server using sv_pure)

Added sv_namechange_cooldown_seconds, to throttle clients from changing their name too rapidly. (Defaults to 20 seconds)

Added sv_netspike_on_reliable_snapshot_overflow to selectively enable the automatic dumping of netspike file if a client drops due to "reliable snapshot overflow" (defaults to 0, which disables the debugging)

Added check to prevent player names from containing color codes

setinfo console command will now reject attempts to set / change convars with any unusual characters

Marked mem_force_flush as a cheat to prevent client exploits

Fixed %n console crash in the client

Updated client rate value to default to 30000 to improve network performance for most players

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (TF2, DoD:S, HL2:DM, CS:S)

Fixed a problem that allowed spoofed IP addresses to make connections to the game server

Team Fortress 2

Teddy Roosebelt can now get assists in Pyrovision

Fixed Pyrovision sometimes activating in killcams for more than just weapons and cosmetics

Fixed exploit where the Scorch Shot could fire its short range kill pellet at the very beginning of the taunt

Fixed blood getting sprayed on the world in some cases in Low Violence and Pyrovision

Added ConVars sv_rcon_maxpacketsize and sv_rcon_maxpacketbans to allow server admins to control the maximum RCON packet size and whether or not users get banned for exceeding that limit. The defaults reflect the existing behavior.

An update to Counter-Strike: Source has been released. The update will be applied automatically when your Steam client is restarted. The major changes include:

Limit the effective FOV of players using wide-screen resolutions with aspect ratios wider than 1.85:1. The sv_restrict_aspect_ratio_fov ConVar can be changed to remove the restriction or make the restriction also apply to full-screen players.

Fixed a demo playback crash

Changed the way bot counts are displayed in the server browser: the bot column is now next to the player column and always visible. Bot count is no longer subtracted from maxplayers.

Adjusted error messages on servers when players drop due to Steam authentication failure to be more clear

Additional important server messages now go to the server log instead of just the console

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (TF2, DoD:S, HL2:DM)

Fixed a bug which caused Windows Aero Extensions video option to always be enabled, regardless of setting. Disabling this can improve compatibility with third-party programs and overlays, but may also affect performance.

Fixed SourceTV showing player counts for the game server instead of the number of clients connected to the SourceTV server

Team Fortress 2

Australian Christmas has begun!

Added community-contributed winter event items

Added new Grordbort Pyro and Engineer item sets

Added the "Valve Gift Grab 2011  TF2" achievement

Added Naughty and Nice winter keys to the Mann Co. store

Added a new Valve-authored control point map: Foundry

added 12 achievements for Foundry

added achievement reward milestone reward for Foundry achievement

Added UGC Highlander medals

Relaxed some restrictions on what misc items can be equipped simultaneously

Additional improvements for client stability

Updated the localization files

Day of Defeat: Source

Added the "Valve Gift Grab 2011  DoD:S" achievement

Updated the localization files

Counter-Strike: Source

Added the "Valve Gift Grab 2011  CS:S" achievement

Added rate limiting for connections and added the following ConVars to support that: